Many subsequent observational studies on the physical and chemical characterization of L1157-B1 have been carried out both with (sub)millimeter single-dish and interferometers, which led to a rather detailed, consistent picture of the outflow shock while unveiling its chemical richness (see e.g. [1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]}, [8]}, [9]}, [10]}, [11]}, [12]}, [13]}).
The spatial distribution of the HCN emission in the L1157 southern outflow lobe was obtained at \(\approx 5\)  scale for the first time by [14]} with the IRAM Plateau de Bure interferometer. The emission of the rare \(^{13}\) C, D and \(^{15}\) N isotopologues was investigated a few years later at a few arcsec resolution with the IRAM NOEMA interferometer [15]}, [16]}. In particular, the distribution of DCN was shown to result from a combination of gas-phase chemistry that produces the widespread DCN emission, dominating especially in the head of the bow-shock, and sputtering from grain mantles toward the jet impact region.
